package com.chif.mapreduce.writable;

import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

import java.io.IOException;

//Map默认读取数据的格式 LongWritable(行号), Text(每一行数据)
public class FlowMapper extends Mapper<LongWritable, Text,Text,FlowBean> {

    private Text outK=new Text();
    private FlowBean outV=new FlowBean();

    @Override
    protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
        //1 读取一行数据，转成字符串
        String line = value.toString();

        //2 切割数据
        String[] split = line.split("\t");

        //3 抓取我们需要的数据：手机号，上行流量，下行流量
        String phone = split[1];
        String up = split[split.length-3];
        String down = split[split.length-2];

        //4 封装 outK outV
        outK.set(phone);
        outV.setUpFlow(Long.parseLong(up));
        outV.setDownFlow(Long.parseLong(down));
        outV.setSumFlow();

        //5 写出outK outV
        context.write(outK,outV);
    }
}
